Apparatus for burning lime.



No. 703,240. Patented Sept. 2, I902.

' a. A. MACE.-

APPARATUS FOR BURNING LIME.

- (Application flled leb. 2a, 1902.

(No Model.)

- To all 70/1/0722, it may concern;

Be it known that I Menominee Falls, sha andStat-o of new and useful I for Burning Lime description, refer panying drawin specification.

My invention has 1' apparatus for'burnin UNITED STATES FATE-N GARVVIN A. MACE, OF

SPECIFICATION f0; ning' part of Letters Patent No. 708,240,

Application filed February 28,

oughly mixed dust or other is the coal-du ing and warm for a perfect mixture,

incidental objec sists of the devices a as hereinafter set forth.

panying drawings, Figure lis position to receive the coal dust therein dimyimprovements,showingthe rectly from cars from In the accom nd of,the hot-air an gas pipe this bin to and com and Fig. 2 is a vertical secterior of the mixing-chamberisa tub e17, and

ticnal view of a-modified form of construcwithin this tube is walls, and 5 t oompanying drawings,

APPARATUS FOR summc LIME.

giime. tion-fan 7, operated in an ner, may be employed for t proved construction wherevantage, and leading-from ases which are conducted other device is another pi amber of the kiln back to of the l entering the fire-chamber t" is chamber the pipe 8 lo a mixing-chamber and thorcates with the interior th and commingled with the coal- Projecting from pipe 6 material which is used as the which at its outer end is is also fed in even quantities air. This ezgtension is chamber, and hence not only of a valve 11. In the thereby given an initial heattension 10, is a valve 1 th before entering the fireamount of hot air and and quick combustion thereby pro- .main chamber of the k moted, but also an absolute provision is made between the suction inasmuch as an even chamber, is another va feed of coalor fuel to the mixing-chamber the flow to'th can always be provided for, which, of course, end of the mixingis not the case where the coal-dust or fuel is a projecting tube into the fire. fire-chamber.

imekiln is a mixin r Orrrcn.

MENOMINEE FALLS, WISCONSIN.

dated September 2, 1902. 1902-. Serial No. 96,074. (No model.)

, understood as limiting myself to su GARWIN A. MACE, of adaptation, inasmuch as it isob in the county of Waukesaid improvements ma Visconsin, have invented a with diiferent and varyin mprovement in Apparatus Communicating with th of which the following isa a point above the fireence being-had to the accomsaid pipe leading outwa gs, which are a part of this eating with any suitable suction or for drawing t elation to an improved from the main chamber.

ybe used in connection gases An ordinary su-eu I y desirable manhis purpose to ad this suction-fan or pe 8. At the front -chamber 9, and to ads and communiereof. is an extension 10,- open to the external controlled by means pipe 6, above the ex- 2, which regulates the gases passing from the iln, and in t fan and th lve 13, whic e mixing-chamber.

chamber is pro 14, which exten mary object and other The numeral 15 indicates a frame which view the invention consupports a bin or receptacle 16, nd parts or their equivacoal-dust to be fed to the kiln'i e main chamber inclosed by said preferably byextending thejshaf he fire chamber communicating wardly through the side of the bi at its inner end with the main chamber and ing on said outer end a pull 1 at its outer end with t he exterior. which an endless belt, (not sho v e myimprovements in from any suitable source of pow connection with a limekiln of the construc- Within the fire-chamber 5 nd lilustrated in the acting in inclined guideways 20, i yet I do not wish to be This plate is arranged below th yer is operated s a plate 21. e lower end of a screw conveyor 18, said conveyor extending into andacross the lower g to the drawings, the numeral 3 portion of the bin. The conve s of an ordinary form of in any of the usual and well-known way ICC the tube I l and is by preference so construct- .ed as to be capable of adjustment either inwardly or outwardly; Any desirable means for effecting this adjustment may be provided; but I prefer to employ the construction shown in the accompanying drawings, consisting of a rack-bar 22 or. the under side of the plate, said rack-bar adapted to be engaged by a pinion 23, mounted on ashaft 24. One end of said shaft may be provided with a suitable crank or handle for convenience in turning the same. It is obvious that when the shaft is turned the pinion is caused to act on the teeth of the rack-bar, and hence the plate is caused to be moved inwardly or outwardly, in accordance with the direction of turning. From the fact that this plate is located directly in the fire-cham her it of course necessarily becomes very hot, and consein securing aquick or rapid combustion. The

plate is lined with fire-brick, in order to preserve it against the intense heat to which it is subjected.

While I prefer to employ a plate adjustable inwardly and outwardly, yet I do not-wish to limit myself thereto,inasmuch as a fixed plate may be employed, so located that the fuel from the mixing-chamber will fall thereon and be subjected to an initial heating. The plate is made adjustable, primarily, for the purpose of providing a means for securing an unobstructed draft during the time the kiln is being initially heated. At such time the plate is adjusted outwardly to its full extent, so as not to project into the fire-chamber, and

thereby form any obstruction therein, which might clog up the draft-passage through the fire-chamber.

In the operation of my invention the stone to be treated is fed into the main chamber 4 and the flame and heat of the fire passed through it to the top of the kiln. The hot air and gases are then drawn into the pipe 6 through the action of the fan or other medium, thence upwardly in the pipe 8 to the mixing-chamber. The coal-dust or other material used as a fuel is dumped into the bin 16 and is then caught by the endless screw couvcyer and carried in regular and even quantities to the mixing-chamber, where it is perfectly mixed with the hot air and gas in said chamber, and which are fed thereto through the pipes G and S. The mixture then passes through the tube It onto the plate 21, where, as before stated, it is subjected to an initial heat and is then in such condition as to be quickly consumed by the fire in the firechamber. Of course before the operation described is commenced the several valves 11, 12, and 13 are properly adjusted. It is necessary that a provision should be made for the entrance of a desirable quantity'of cold air, so as to secure combustion, and hence I employ the short valve-controlled pipe or) tube 10, leading to and communicating with the pipe 6.

The form of construction illustrated in Fig. 2 differs in specific details from that shown in Fig. 1. For instance, instead of employing an endless screw con veyer an endless conveyor-belt is provided, and, furthermore, the mixing-chamber and the hot-air and gas passage are arranged within the front wall of the kiln. Referring to this figure, the numeral 25 indicates the passage leading from the main chamber and adapted for conducting the hot air and gases from said chamber. Leading from this passage and communicating with the external air is a valve-controlled cold-air tube or passage 26. The passage 25 leads to a suction-fan chamber 27, which may also be located in the front wall of the kiln, and from this suction-fan chamber leads a passage 28,

which communicates with the mixing-chamber 29, which chamber is also formed in the front wall of the kiln and communicates at its lower end with the fire-chamber, as clearly shown in the drawings. The endless conveyer is indicated by the numeral 30, and this conveyer is arranged within a casing 31, said casing having the upperand lower shafts and 33, respectively, journaled therein, said .shafts having the sprocket-wheels 3i and 35, respectively, around which the endless spocket-chain of the conveyer'passes. The lower end of the casing 31 is provided with an opening 36, which opening is at the bottom of a hopper or bin 37, into which hopper or bin the coal-dust or other fuel is dumped. To prevent the coal-dust from clogging at the opening 36, I prefer to provide a gate 37, said gate being mounted on a shaft 38 and having a finger 39 projecting inwardly therefrom and adapted to be contacted with by the teeth of a small wheel 40, mounted on the shaft 33. It is obvious that as said shaft 33 is revolved the contact of the teeth of the wheel 40 with the finger 39 of thegate 37 will cause said gateto be constantly agitated, and hence prevent possibilityof any clogging at the opening 36.

As the coal-dust passes into the bottom of the IIO mixing-chamber, where it is mixed with the solely thereto, inasmuch as I desire to claim the apparatus in connection be found adaptable.

' leading from'the kiln back to the fire-chamber thereof,

with any other form ofkiln or heating device to which it may What I claim as my invention is- 1. The combination of a kiln, a passage fire, means within the passage for drawing the hot air and gases from the kiln into said passage and back to the fire, a mixing-chamber to which the passage leads, said mixing-chamber being in communication with the fire-chamber of the kiln, a valve in the passage between the mixing-chamber'and the drawing or suction means, a valve in said passage in advance of said drawing or suction means, an air-duct also'in advance of the drawing or suction meansand communicating with the pas sage, and means for feeding a fuel to the mixing-chamber, said fuel and the hot air and gases being thereby mixed and comniingled in the mixing-chamber, before being finally conducted into the fire.

2. The combination of a kiln, a plate in the means for adj usting said plate inwardly and outwardly, and means for discharginga fuel onto theplate to thereby give said fuel an initial heating.

3; The combination of a kiln, a plate in the fire-chamber thereof, a passage leading from the kiln at a point abovethe fire-chamber and extending back to said fire-chamber, I means for drawing hot air and gases through said passage and back to the fire-chamber,

and means-for feeding fuel into said passage,

and for discharging said fuel, and the hot air 3 5 and gases mixed therewith onto the plate.

4. The combination of a kiln, a passage leading from the kiln back to the fire, means I for drawing the hot air and gases fromthe kiln through said passage and back to the fire, a receptacle, a bin providedwith an opening leading to the receptacle, a gate for said opening, means for agitating said gate, a con- Veyer adapted to convey the fuel discharged into the receptacle, and a conduit leading from the receptacle to the passage, the said conveyer adapted to conduct the fuel to, the conduit, and the conduit to discharge said fuel into the passage, whereby the. fuel is mixed with the hot air and gases prior to being discharged into the fire.

In testimony whereof I aflix my signature in presence of two witnesses.

, GARWIN A. MACE. Witnesses: A. L. MORSELL',

ANNA V. FAUST. 

